diff --git a/refresh-certificate.py b/refresh-certificate.py
index c586795..3c9951a 100755
--- a/refresh-certificate.py
+++ b/refresh-certificate.py
@@ -381,7 +381,7 @@ def self_signed(hostname:str, verify:bool, username: str, password: str, bearer=
 
 
 @typechecked
-def get_certificates(hostname:str, verify:bool, username: str, password: str, 
+def get_certificates(hostname:str, verify:bool, username: str, password: str,
                      bearer=None) -> dict[int, dict]:
     """
     Retrieve a list of certificates from an HP CDM server.
@@ -535,11 +535,11 @@ def main():
 
     subparsers.add_parser('self', help='Create a self-signed certificate.')
 
-    parser_delete = subparsers.add_parser('del', help='Delete a certificate')
+    parser_delete = subparsers.add_parser('del', help='Delete a certificate.')
     parser_delete.add_argument("-#", "--number", dest='certid', required=True, type=int,
                         help="Certificate number as given by list command.")
 
-    parser_create_csr = subparsers.add_parser('csr', help='Create CSR')
+    parser_create_csr = subparsers.add_parser('csr', help='Create a certificate signing request.')
     parser_create_csr.add_argument("-C", "--country", dest='country', required=False, default='US',
                                  help="Country.")
     parser_create_csr.add_argument("-s", "--state", dest='state', required=False, help="State.")
@@ -551,7 +551,7 @@ def main():
     parser_create_csr.add_argument("-o", "--output", dest='output', required=False, default=None,
                                  help="Output file.")
 
-    parser_install_certificate = subparsers.add_parser('pem', help='Install certificate')
+    parser_install_certificate = subparsers.add_parser('pem', help='Install a certificate.')
     parser_install_certificate.add_argument("-i", "--input", dest='input', required=True,
                                            default=None, help="Input file.")
 
@@ -639,8 +639,8 @@ def main():
                 subject = cert.get('subject')
                 issuer = cert.get('issuer')
                 validity = cert.get('validity')
-                begin = parse(validity.get('fromDate'))
-                end = parse(validity.get('toDate'))
+                begin = parse(validity.get('fromDate')).strftime('%Y-%m-%d (%H:%M)')
+                end = parse(validity.get('toDate')).strftime('%Y-%m-%d (%H:%M)')
                 print(f'{certid} - {subject} issued by {issuer}. From: {begin} to {end}')
         case 'del':
             bearer = get_bearer(hostname=args.hostname, verify=args.verify, username=args.username,